Tobacco pipe



April 10, 1951 R. o. FERGUSON 2,548,297

TOBACCO PIPE Filed Aug. 25, 1947 Patented Apr. 10, 1951 UNIT-'ED vSTATESwPATENT GFFICE TOBACCO PIPE -Robert 0. Ferguson, Bristol, Tenn.,ass'ignorof one-half to Bristol Steel & Iron Works, Incl, Bristol,Va.-Tenn., a corporation 'of Virginia 'Application August 25,19217,sria111o. $70,443

sclaims. (01131-195) 1 This invention relates 'to 'a ytob'acc'zo -pipeand-its prime Objectis to provide a tobacco pipe which will ail-ord moresmoking pleasure to the user.

The lco'i'iventional tobacco pipe will usually enable the smoker toobtain acleancoolfsmoke when the pipe is viirs-t lit. As the smokingcontinues, however, the smoke becomes hot to a'degree which will veryoften -burn the smokers tongue. Also, it -is seldom vpossible to burnall of the tobacco w-ithin the ybowl of the conventional pipe becausethe tobacco in the heel portion of the bowl becomes sog-gy fromA-li-ltering the moisture in the smoke drawn therethrough, as well as-froin the tobacco juices, etc. Furthermore, the bowl of theconventional pipe becomes quitenhot after continued smoking and uwhensuch occasion arises, the bowl fails to lower the temperature of thesmoke.

The main vobject of this invention Ais to elimihate the problems of the'conventional pipe of overheating of the upper 'pipe bowl, clogging ofthe screw threads `forr'ni'ng the connection 'of the pipe `bowl and itsbase and to provide, at all stages of the smoking, a clean cool Asmoke.

Another object of the invention is to provide a tobacco pipe having apair of bowls wherein the same may be easily and Yquickly securedtogether in air sealing engagement;

Still another object of the invention is to provide screw threads in theupper and lower ,bowls of the tobacco pipe, the screw threads formingmeans for `quickly 'securing the bowls together.

In general, the main object of the invention is obtained b'y providingtwo separate bowls which are detachably secured together, the upper bowlhaving atobacco burning chamber formed therein, while the lower bowl iscompletely separated from the upper bowl, `e'cept for a sin-oke passageor bore which provides smoke communication between the bowls'. The lowerbowl is spaced a considerable distance from the upper bowl to prventheat from radiating from the burning chamber to the lo'wer bowl, and thelower bowl has a ehahber formed therein, which chamber mail be filledwith a l'llteidng medium. The passage or bore providescommunioationbetween the two chambers to permit the smoke to pass fromthe burning chamber to the ltering chamber and after the smoke hasbeeniiltered through the mediuxnco'ntained within the Vfilteringchamber, the smoke passes laterally` outwardly through a bore or boresformed through the stem receiving portion of the lower bowl and theniinallyinto the pipe stem proper. annular heat dissipat- 2 ing groovei'sprovided in the upper bowl to reduce the 'temperature thereof.Reference is m'ade to applicants copending applications serial No.546,128, filedY .July 2,2,

1944,'seria1-1vo. 596,613, one May 30, 1945, and

"portion 'of the upper =bow1 A is 'provided with a,

bottom 3 having'an'inlinedbore lI 0 formed therethrough. Theklowerportion vof the bowl A is of reduced annular s iae to 'form laplug-like member Af5 having 'screwthreads t2 'formed,therein., Anannular heat radiating :groove 2 is formed about the outer peripherypfthe bowl A thus forming Van annular ring '4 havinga flat underside 1.fAn

'annular groove l is 4formed the bottom 'of the plug I5 and is locatedadjacent the outer periphery thereof and in 'communication with thesmoke passage bore ll o The lower bowl, generally indicatedat B, isprovided with a smo'keltering and cooling chainber 8. Screw threads I3formed about the upper portion of theinnerperiphery of the chamber sYterminate in an annular inwardly tapering shoulder, as indicated vat 6.The lower bowl B hasa stem portion S., the stem portion S in turn havingan enlarged bore 5' extending from the outer end thereof inwardly, to apoint short of the iltering chamber 8. IA pair of diverging, boresv 9form smoke passageways from the bore 5 to the Chamber 8- Y s o I Beforethe pipe is assembled, as shown in Fig. ures 1 and 2, the filteringchamber 8 formed in the lower bowl yB is lled, or substantially filled,with a filtering media. While any iiltering media will suiiice f -orvthe purpose intended, I have found that smoking tobacco forms an idealnltering media, th e tobacco being capable of absorbin'g impurities andmoisture from the smoke and also of lowering the temperature of thesmoke materially. It has been vfound in actual use that very oftenparticles of tobacco will lodge in the screw threads 1 3 and, asheatwill expand such particles of tobacco, it often becomes difficult tounscrew the upper bowl from the lower bowl when the upper bowl ofthepipeis warm; Y Accordingly, the' abrupt non-tapering shoulders I4 formed 1nthe screw threads l2 will dislodge' such particles oftobacoo normallyadhering in the screw threads l2 and I3.y After, the lawyer` bowl hasbeen substantially filled with tobacco,`

indicated at 5, thus permitting expansion of either or both bowls, butpreventing the bowls from becoming so tightly secured to each other sothat it would be diicult to unscrew the same. After the bowls are thusassembled, smoking tobacco is placed in the smoke burning chamber I andthe pipe lit in the usual manner. Suction through the pipe stem, bores5' and 9, filtermg and cooling chamber 8 and bore I0, will draw thesmoke formed in the burning chamber I down through the bore Ill. It willbe noted that the positioning of bore I0 is such that the greaterportion of the smoke entering chamber 8 will pass from the lower portionof bore I0 downwardly through the filtering media and then into bores 9which converge into bore 5 and then into the pipe stem. The annulargroove 2 and ring or iiange 4 formed in the outer periphery of the bowl8 will enable air to circulate therein to thus dissipate a substantialamount of heat which is normally formed at the lower portion of thesmoke buring chamber I. As the two chambers I and 8 are separated fromeach other by bottom 3 which is of a substantal` thickness, the lowerbowl B is always maintained at a temperature much lower than thetemperature of the upper bowl A and accordingly, the filtering media inthe filtering chamber 8 is substantially cool. The hot smoke andimpurities therein, formed by the burning tobacco in chamber I arecooled to a substantial degree and the impurities and moisture in thesmoke are removed by the filtering media in chamber a before the smokecan pass into the pipe stem.

I claim:

1. A smoking pipe comprising a pair of bowls, means for detachablysecuring said bowls to` gether one above the other, the upper bowlforming a tobacco burning chamber and the lower bowl forming a smokecooling and filtering chamber, a partition formed integrally with theupper bowl and positioned below the burning chamber for separating thetwo chambers, Asaid partition having a smoke bore extending therethroughat a maximum distance from the stem of said pipe to providecommunication between said burning chamber and said filtering chamber,and a stem receiving portion formed integrally with the lower bowl, saidpartition and upper bowl having together a Ventilating and coolingannular groove on the exterior thereof, and a ange on said partitionhaving upper and lower surfaces, the upper surface forming the lowerwall of said groove, said lower bowl havmg an upper end surface, saidlast named surface being downwardly and inwardly inclined toward thecenter of said lower bowl and said lower surface of said ange beingadapted t0 engage a circumferential portion only adjacent the outer edgeof the end surface of said lower bowl, said rst named means comprising ascrew threaded connection on the exterior' of the D211'- tition and theinterior of the upper pol-tion @lf the lower bowl whereby when saidupper bowl is fully screw threadedly engaged with said lower bowl thelower surface of said ange forms an air-tight seal and a lock with theupper end surface of said lower bowl, without substantial deformation ofsaid flange.

2. A smoking pipe comprising a pair of bowls, means for detachablysecuring said bowls together one above the other, the upper bowl forminga tobacco burning chamber and the lower bowl forming a smoke cooling andfiltering chamber, a partition formed integrally with the upper bowl andpositioned below the burning chamber for separating the two chambers,said partition having a smoke bore extending therethrough at a maximumdistance from the stem of said pipe to provide communication betweensaid burning chamber and said ltering chamber, and a stem receivingportion formedrintegrally with the lower bowl, said partition and upperbowl having together a Ventilating and cooling annular groove on theexterior thereof, and a flange on said partition having upper and lowersurfaces, the upper surface forming the lower wall of said groove, saidlower bowl having an upper end surface, said last named surface engagingthe lower surface of said iange, one of said engaging surfaces beingdownwardly inclined towards one edge thereof and the said inclinedsurface being adapted to engage a circumferential portion only adjacentthe outer edge of the other surface, and said first named meanscomprising a screw threaded connection on the exterior of the partitionand the interior of the upper portion of the lower bowl whereby whensaid upper bowl is fully screw threadedly engaged with said lower bowlthe lower surface of said flange forms an air-tight seal and a lock withthe upper end surface of said lower bowl, without substantialdeformation of said ange.

3. A smoking pipe comprising a pair of bowls, means for detachablysecuring said bowls together one above the other, the upper bowl forminga tobacco burning chamber and the lower bowl forming a smoke cooling andfiltering cham-f ber, a partition formed integrally with the upper bowland positioned below the burning chamber for separating the twochambers, said partition; having a smoke bore extending therethrough ata maximum distance from the stem of said pipe to provide communicationbetween said burning chamber and said filtering chamber, and a stemreceiving portion formed integrally with the lower bowl, said partitionand upper bowl having together a Ventilating and cooling annular grooveon the exterior thereof, and a flange` on said partition having upperand lower surfaces, said upper surface forming the lower wall of saidgroove, said lower bowl having an upper end surface, said last namedsurface engaging the lower surface of said flange, one of said engagingsurfaces being downwardly inclined toward an edge thereof and the saidinclined surface being adapted to engage a circumferential portion onlyadjacent the outer edge of the other surface, and said rst named meanscomprising a screw threaded connection on the exterior of the partitionand the interior of the upper portion of the lower bowl whereby whensaid upper bowl is fully screw threadedly engaged with said lower bowlthe lower' surface of said flange forms an air-tight seal and a lockwith the upper end surface of said lower bowl without substantialdeformation of said ange, said screw threaded conbowl being locateddirectly above the ltering n chamber.

ROBERT O. FERGUSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date Kaldenberg May 25, 1869 JohnsonSept. 30, 1924 Davis Oct. 18, 1927 Mancusi June 3. 1930 vNumber NumberName Date Parson Feb. 3, 1931 Hongbaum July 4, 1933 Segal Apr. 9,1935Ikeda June 30, 1936 Martin July 27, 1943 Fawcett Apr. 4, 1944 SwiftSept. 18, 1945 FOREIGN PATENTS Country Date Great Britain 1897 GreatBritain 1908

